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金沙官网登录:How the big bang chilled out

发布时间:2019-03-14 11:03:07来源:未知点击:

YOU would think that right after the big bang, the universe would have been pretty hot. In fact it looks like things were a lot cooler than you might imagine. Cosmologists believe that the universe went through a rapid period of expansion known as inflation. But, says Pedro Ferreira at the University of Oxford, they usually ignore the effects of temperature on inflation – and that’s a big mistake. “At the violent temperatures we assume are around at the time, everything would be moving rapidly,” he says. “Space-time itself would be bubbling and boiling.” Ferreira and João Magueijo,